At least 20 people have been killed and several dozen injured in a collision between two passenger trains in the northern Indian state of Punjab. The cause of the accident has not yet been determined, but India's rail system has a history of deadly accidents.
India's Railroad Minister Laloo Yadav says he has no details about the cause of the crash. Mr. Yadav says he was told that near the town Ferozepur in Punjab state, two trains were in an accident. He adds that he is going to the crash location.
Officials say efforts are under way to help people in the accident, which took place in a rural area, about 300 kilometers northwest of the Indian capital New Delhi.
Accidents are relatively frequent on India's train network, which next to China's is the world's second largest. Some seven thousand passenger trains run every day on tracks covering more than a 100,000 kilometers.
During the winter, fog in India can be a major transportation problem - causing train and car accidents and grounding flights.